Dell Force10 S4810P Configuration Manual page 715

Rate Limit IGMP Join Requests
If you expect a burst of IGMP Joins, protect the IGMP process from overload by limiting that rate at which
new groups can be joined using the command
IGMP requests are denied will use the retry mechanism built-in to IGMP so that they're membership is
delayed rather than permanently denied.
View the enable status of this feature using the command
Prevent a PIM Router from Forming an Adjacency
To prevent a router from participating in Protocol Independent Multicast (PIM) (for example, to configure
stub multicast routing), use the
Prevent a Source from Registering with the RP
Use the command
ip pim register-filter
to a particular group. This command prevents the PIM source DR from sending register packets to RP for
the specified multicast source and group; if the source DR never sends register packets to the RP, no hosts
can ever discover the source and create an SPT to it.
In Figure 33-3, Source 1 and Source 2 are both transmitting packets for groups 239.0.0.1 and 239.0.0.2. R3
has a PIM register filter that only permits packets destined for group 239.0.0.2. An entry is created for
group 239.0.0.1 in the routing table, but no outgoing interfaces are listed. R2 has no filter, so it is allowed
to forward both groups. As a result, Receiver 1 receives only one transmission, while Receiver 2 receives
duplicate transmissions.
ip igmp group-join-limit
command from INTERFACE mode.
ip pim neighbor-filter
from CONFIGURATION mode to prevent a source from transmitting
from INTERFACE mode. Hosts whose
from EXEC Privilege mode.
show ip igmp interface
Multicast Features | 715